﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace App14._5
{
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }
    }

    public class TimeButton : Button
    {
        public TimeButton()
            : base()
        {
        }

        protected override void OnClick()
        {
            TimeHistory.Add(DateTime.Now);

            MessageBox.Show("There're " + TimeHistory.Count.ToString() + " time recorded!");
        }

        private static readonly DependencyPropertyKey TimeHistoryKey =
        DependencyProperty.RegisterReadOnly("TimeHistory",
        typeof(List<DateTime>), typeof(TimeButton),
        new FrameworkPropertyMetadata(new List<DateTime>()));

        public static readonly DependencyProperty TimeHistoryProperty =
        TimeHistoryKey.DependencyProperty;

        public List<DateTime> TimeHistory
        {
            get { return (List<DateTime>)GetValue(TimeHistoryProperty); }
        }
    }
}
